Investigation on the Photoelectrocatalytic Activity of Well-Aligned TiO₂ Nanotube Arrays

Figure 1

FESEM top-view images (a) and cross-section (b) of TiO₂ nanotube arrays and the magnified image of the TiO₂ nanotube arrays after annealing (c). TEM images of a typical annealed single TiO₂ nanotube (d) and high magnification image showing a lattice spacing of 0.35 nm, corresponding to anatase phase (inset).

(a)

(b)

(c)

(d)